PROENÇA, C. E. B.; FARIAS-SINGER, R.; GOMES, B. M. PLEONOTOMA ORIENTALIS (BIGNONIACEAE – BIGNONIEAE): EXPANDED DESCRIPTION, DISTRIBUTION AND A NEW VARIETY OF A POORLY KNOWN SPECIES. Edinburgh J. Bot. 2007, 64 (1), 17-23. https://doi.org/10.1017/S0960428606000680.